Here is more info on the Nebraskan variety by V.S. Asmundson.
Day old poults of the Nebraskan variety have white down with a brown head spot or spots. The first plumage is white, the second or juvenile plumage has black pigment scattered through it and the amount of pigment is apparently increased in the adult plumage although none of the feathers are completely black. The amount of pigmentation in plumage on different parts of the bird varies, as it does typically on many color varieties of this species, there being more pigment in the plumage on the neck,back and part of the wings than on other parts of the bird.
Breedings of Nebraskan birds produced only spotted progeny, while breedings of Nebraskan males with bronze hens and with brown produced only bronze pattern progeny.
The plumage color of the Nebraskan variety of turkeys is determined by an autosomal gene, which may be designated sp, recessive to non-spotting or solid color such as found in the bronze. The sp gene appears to be the only one determining the differences between the plumage color of the Nebraskan and the bronze varieties.
The genotype would be bb spsp, bronze based with the spotting mutation.
Photo Courtesy: Turkey World Magazine from back in 1950
Photo Courtesy: Dr. Edward Buss: Professor of Agriculture, Emeritus
The Pennsylvania State University, 1960's
Nebraskan poult showing brown head spot, Photo courtesy Dr. Edward Buss, 1960's
